If genuine exposition of the Word of God is to take place, [everything else] must be subordinate to the central and irreducible task of explaining and presenting the biblical text.
Expository preaching is inexplicably bound to the serious work of exegesis. If the preacher is to explain the text, he must first study the text and devote the necessary hours of study and research necessary to understand the text. The pastor must invest the largest portion of his energy and intellectual engagement (not to mention his time) to this task of “rightly handling the word of truth” (2 Tim 2:15). There are no shortcuts to genuine exposition…
The preacher rises in the pulpit to accomplish one central purpose— to set forth the message and meaning of the biblical text.
—Dan Dumas, A Guide to Expository Ministry